Power receiving apparatus, power transmitting apparatus, control methods thereof, and non-transitory computer-readable storage medium

Abstract

A power receiving apparatus comprises a power receiving unit that receives power transmitted wirelessly from a power transmitting apparatus, a communication unit that transmits, to the power transmitting apparatus, information regarding a received power received by the power receiving unit, and a control unit that determines whether or not it is necessary to update a reference value which is generated in the power transmitting apparatus on the basis of the information regarding the received power and is used for a detection of an object different from the power receiving apparatus by the power transmitting unit and requests the power transmitting apparatus to update the reference value when it is determined that it is necessary to update the reference value.

What is claimed is: 
     
       1. A power receiving apparatus comprising:
 one or more processors; and 
 one or more memories which store instructions executable by the one or more processors to cause the power receiving apparatus to perform: 
 receiving power transmitted wirelessly from a power transmitting apparatus via a power receiving coil; 
 transmitting, to the power transmitting apparatus, information regarding the received power; 
 negotiating with the power transmitting apparatus to determine a guaranteed power; 
 determining, during wireless power transmission under the determined guaranteed power, whether or not it is necessary to update a reference value, the reference value being generated by the power transmitting apparatus based on the information regarding the received power obtained for the determined guaranteed power and being used for a detection of an object different from the power receiving apparatus by the power transmitting apparatus; and 
 requesting the power transmitting apparatus to update the reference value for the determined guaranteed power in a case where it is determined that it is necessary to update the reference value. 
 
     
     
       2. The apparatus according to  claim 1 ,
 wherein, in the determining whether or not it is necessary to update the reference value, it is determined to be necessary to update the reference value when a state of the power receiving apparatus satisfies a condition. 
 
     
     
       3. The apparatus according to  claim 2 ,
 wherein it is determined that the state of the power receiving apparatus satisfies the condition when a temperature measured for the power receiving apparatus is outside a range. 
 
     
     
       4. The apparatus according to  claim 2 ,
 wherein it is determined that the state of the power receiving apparatus satisfies the condition when a power consumption of the power receiving apparatus is outside a range. 
 
     
     
       5. The apparatus according to  claim 1 ,
 wherein, in the determining whether or not it is necessary to update the reference value, it is determined that it is necessary to update the reference value when the power transmitting apparatus has made a request to issue the request to update the reference value. 
 
     
     
       6. The apparatus according to  claim 1 , wherein the instructions executable by the one or more processors further causes the power receiving apparatus to perform:
 making an instruction to the power transmitting apparatus to reduce a power transmission output based on the determination that it is necessary to update the reference value. 
 
     
     
       7. The apparatus according to  claim 6 ,
 wherein, in the requesting the power transmitting apparatus to update the reference value, it is requested that the power transmitting apparatus update the reference value after the received power from the power transmitting apparatus has dropped to a first value in response to the instruction. 
 
     
     
       8. The apparatus according to  claim 1 ,
 wherein, in the transmitting the information regarding the received power, the information regarding the received power is transmitted via the power receiving coil. 
 
     
     
       9. A power transmitting apparatus comprising:
 one or more processors; and 
 one or more memories which store instructions executable by the one or more processors to cause the power transmitting apparatus to perform: 
 wirelessly transmitting power to a power receiving apparatus; 
 negotiating with the power receiving apparatus to determine a guaranteed power; 
 obtaining a reference value which is obtained from a power transmission value and a received power value specified by received power information received from the power receiving apparatus, 
 the received power information received from the power receiving apparatus being obtained by the power receiving apparatus for the determined guaranteed power, and the reference value being used by the power transmitting apparatus for a detection of an object different from the power receiving apparatus; 
 
       storing the reference value; 
       receiving an update request, from the power receiving apparatus, to update the reference value for the determined guaranteed power; and
 in response to the update request, updating the stored reference value based on the received power information received from the power receiving apparatus, the received power information being obtained by the power receiving apparatus for the determined guaranteed power. 
 
     
     
       10. The power transmitting apparatus according to  claim 9 , wherein the power transmitting apparatus further comprising performs:
 determining whether or not it is necessary to update the stored reference value; and 
 requesting the power receiving apparatus to issue the update request when it is determined to be necessary to update the reference value. 
 
     
     
       11. The power transmitting apparatus according to  claim 10 ,
 wherein it is determined to be necessary to update the reference value when a measured temperature is outside a range. 
 
     
     
       12. The power transmitting apparatus according to  claim 10 , wherein the power transmitting apparatus further performs:
 causing a transmitted power to the power receiving apparatus to drop to a first value when it is determined to be necessary to update the reference value. 
 
     
     
       13. The power transmitting apparatus according to  claim 12 ,
 wherein the transmitted power is caused to rise after causing the transmitted power to drop to the first value, and 
 updating the reference value based on the power transmission value after the transmitted power has been caused to rise, and the received power information received from the power receiving apparatus. 
 
     
     
       14. The power transmitting apparatus according to  claim 13 ,
 wherein after causing the transmitted power to drop to the first value, the transmitted power is caused to rise until the received power value indicated by the received power information reaches a second value. 
 
     
     
       15. The power transmitting apparatus according to  claim 10 ,
 wherein a request to issue the update request is included in a signal responding to the received power information being received from the power receiving apparatus. 
 
     
     
       16. A method of controlling a power receiving apparatus, the method comprising:
 receiving power transmitted wirelessly from a power transmitting apparatus via a power receiving coil; 
 transmitting, to the power transmitting apparatus, information regarding the received power; 
 negotiating with the power transmitting apparatus to determine a guaranteed power; 
 determining, during wireless power transmission under the determined guaranteed power, whether or not it is necessary to update a reference value, the reference value being generated by the power transmitting apparatus based on the information regarding the received power obtained for the determined guaranteed power and being used for a detection of an object different from the power receiving apparatus by the power transmitting apparatus; and 
 requesting the power transmitting apparatus to update the reference value for the determined guaranteed power in a case where it is determined that it is necessary to update the reference value. 
 
     
     
       17. A method of controlling a power transmitting apparatus, the method comprising:
 wirelessly transmitting power to a power receiving apparatus; 
 negotiating with the power receiving apparatus to determine a guaranteed power; 
 obtaining a reference value which is obtained from a power transmission value and a received power value specified by received power information received from the power receiving apparatus, 
 the received power information received from the power receiving apparatus being obtained by the power receiving apparatus for the determined guaranteed power, and 
 the reference value being used by the power transmitting apparatus for a detection of an object different from the power receiving apparatus; 
 storing the reference value; 
 receiving an update request, from the power receiving apparatus, to update the reference value for the determined guaranteed power; and 
 in response to the update request, updating the stored reference value based on the received power information received from the power receiving apparatus, the received power information being obtained by the power receiving apparatus for the determined guaranteed power. 
 
     
     
       18. A non-transitory computer-readable storage medium storing a program that causes a computer to execute a method of controlling a power receiving apparatus, the method comprising:
 receiving power transmitted wirelessly from a power transmitting apparatus via a power receiving coil; 
 transmitting, to the power transmitting apparatus, information regarding the received power; 
 negotiating with the power transmitting apparatus to determine a guaranteed power; 
 determining, during wireless power transmission under the determined guaranteed power, whether or not it is necessary to update a reference value, the reference value being generated by the power transmitting apparatus based on the information regarding the received power obtained for the determined guaranteed power and being used for a detection of an object different from the power receiving apparatus by the power transmitting apparatus; and 
 requesting the power transmitting apparatus to update the reference value for the determined guaranteed power in a case where it is determined that it is necessary to update the reference value. 
 
     
     
       19. A non-transitory computer-readable storage medium storing a program that causes a computer to execute a method of controlling a power transmitting apparatus, the method comprising:
 wirelessly transmitting power to a power receiving apparatus; 
 negotiating with the power receiving apparatus to determine a guaranteed power; 
 obtaining a reference value which is obtained from a power transmission value and a received power value specified by received power information received from the power receiving apparatus, 
 the received power information received from the power receiving apparatus being obtained by the power receiving apparatus for the determined guaranteed power, and 
 the reference value being used by the power transmitting apparatus for a detection of an object different from the power receiving apparatus; 
 storing the reference value; 
 receiving an update request, from the power receiving apparatus, to update the reference value for the determined guaranteed power; and 
 in response to the update request, updating the stored reference value based on the received power information received from the power receiving apparatus, the received power information being obtained by the power receiving apparatus for the determined guaranteed power.